I have seen some major styling issues when I attempted to migrate to 6.5. I reverted the migration as the number of issues were too many to handle at this moment (for me). I thought I should share the information nonetheless.
- scroll bars disappeared at all locations
- some boxes/table headers were flat (height = 0)
- text did not appear (it was in the HTML but the elements seemed to have an height of 0 as well)
I do have a lot of styling customisation going on in my project but wasn’t expecting this. What changed that caused this behaviour?